package vip.xiaonuo.vein.websocket;

import cn.hutool.core.exceptions.ExceptionUtil;
import cn.hutool.extra.spring.SpringUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
import vip.xiaonuo.core.exception.ServiceException;
import vip.xiaonuo.vein.service.WsReplyService;

import javax.annotation.Resource;
import javax.websocket.*;
import javax.websocket.server.PathParam;
import javax.websocket.server.ServerEndpoint;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.CopyOnWriteArraySet;

@Component
@Slf4j
@ServerEndpoint("/websocket/{deviceNo}")  // 接口路径 ws://localhost:82/webSocket/deviceNo;
public class WebSocket {

    @Resource
    WsReplyService wsReplyService = SpringUtil.getBean("WsReplyService.class");

    //concurrent包的线程安全Set，用来存放每个客户端对应的MyWebSocket对象。
    //虽然@Component默认是单例模式的，但springboot还是会为每个websocket连接初始化一个bean，所以可以用一个静态set保存起来。
    //  注：底下WebSocket是当前类名
    private static final CopyOnWriteArraySet<WebSocket> webSockets =new CopyOnWriteArraySet<>();

    // 用来存在线连接用户信息
    private static final ConcurrentHashMap<String,Session> sessionPool = new ConcurrentHashMap<>();


    //与某个客户端的连接会话，需要通过它来给客户端发送数据
    private Session session;

    private String deviceNo;


    @OnOpen
    public void onOpen(Session session, @PathParam(value="deviceNo")String deviceNo) {
        try {
			this.session = session;
			this.deviceNo = deviceNo;
			webSockets.add(this);
			sessionPool.put(deviceNo, session);
			log.info("有新的连接，总数为:【{}】",webSockets.size());
		} catch (Exception e) {
            log.error("连接失败【{}】", ExceptionUtil.getMessage(e));
		}
    }

    /**
     * 链接关闭调用的方法
     */
    @OnClose
    public void onClose() {
        try {
			webSockets.remove(this);
			sessionPool.remove(this.deviceNo);
			log.info("连接断开，总数为【{}】",webSockets.size());
		} catch (Exception e) {
            log.error("失败【{}】",ExceptionUtil.getMessage(e));
		}
    }
    /**
     * 收到客户端消息后调用的方法
     *
     * @param message
     */
    @OnMessage
    public void onMessage(String message) {
        log.info("收到客户端【{}】消息【{}】",deviceNo,message.trim());
        wsReplyService.receiveMsg(deviceNo,message,sessionPool.get(deviceNo));
    }
	  /** 发送错误时的处理
     * @param session
     * @param error
     */
    @OnError
    public void onError(Session session, Throwable error) {
        log.error("用户【{}】错误,原因:【{}】",deviceNo,error.getMessage());
        error.printStackTrace();
    }


    public void sendAllMessage(String message) {
        for(WebSocket webSocket : webSockets) {
            try {
            	if(webSocket.session.isOpen()) {
                    log.info("发送消息 【{}】",message);
                    webSocket.session.getAsyncRemote().sendText(message);
            	}
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public void sendOneMessage(String deviceNo, String message) {
        Session session = sessionPool.get(deviceNo);
        if (session != null&&session.isOpen()) {
            try {
                log.info("回复消息【{}】",message);
                session.getAsyncRemote().sendText(message);
            } catch (Exception e) {
                e.printStackTrace();
                throw new ServiceException(500,"未能与设备完成通信! ");
            }
        }else {
            throw new ServiceException(500,"未能与设备完成通信! ");
        }
    }

    public void sendMoreMessage(String[] deviceNos, String message) {
    	for(String deviceNo:deviceNos) {
    		Session session = sessionPool.get(deviceNo);
            if (session != null&&session.isOpen()) {
                try {
                    session.getAsyncRemote().sendText(message);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
    	}

    }

}
